Help buying and building my first cob light.

rkymtnman

rkymtnman

Well-Known Member
Mike10gs said:
ea you lost me on inline fuse b/t
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inline fuse will protect your cobs if shit hits the fan. the light i built is 6.7 amps so i put a 7.5 amp fuse between the V+ of the driver and the cobs.

you can google search for parallel vs series but you are on the right track. a diagram would help explain/make sense
 
HydoDan

HydoDan

Well-Known Member
Mike10gs said:
That was something else I was wondering about. It does come with a plug to plug it to wall after assembling it together?
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You have to install the plug...
Mike10gs said:
So the ones you told me to get I believe say 54w. So the 120mm would be ok for this right.
I do have an intake and also a fan clipped up top to for air to move around a bit better. Also have exhaust on top.
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Running two Cxms at 1400 mA will put you at 70 watts each... so you will need the 133mm heat sinks..
50 volts x 1.4 amps = 70 watts... This should help you search...
https://www.findchips.com/search/ELG-150-C1400
 
M

Mike10gs

Member
Meant CXM.
Photon Flinger said:
Probably be best to buy an already assembled kit if you aren't comfortable with your electrical knowledge and skills.

Go with a site sponsor either way.
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Seems a bit cheaper to build myself. I know I just have to research good enough Info. Does not seem hard I just want to make sure I get the correct parts.
 
M

Mike10gs

Member
CobKits said:
150W would be fine for your 2x2.

you can so that with anything from 1 large cob at 150W, or 4 small cobs at 35W each. bout $150 either way. the single cob setup is less handiwork required as your hanging a single fixture from a single point and dont need a frame.

either way you choose its not a difficult project and there are plenty of people to help you. DIY is not for everybody but has its advantages:

1. you can build exactly what you want
2. its the cheapest option
3. you will learn valuable LED fundamentals in the process
4. many people take pride in building stuff themselves
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So where could I find this set up. Could you help me. Would like to get everything ordered as I'm getting close to putting new plants in my tent.
 
CobKits

CobKits

Well-Known Member
Mike10gs said:
So the ones you told me to get I believe say 54w.
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"54V" not watts

they actually run 46-54V and as far as wattage can be run anywhere from 10-100+W per chip

most peopel run the luminus at 50-75W

you dont need a fuse. people wire these in both series and parallel, depends on driver selection
 
SoOLED

SoOLED

Well-Known Member
Photon Flinger said:
Probably be best to buy an already assembled kit if you aren't comfortable with your electrical knowledge and skills.

Go with a site sponsor either way.
Click to expand...

its really not that hard, if I can do it anyone can. I cant even change my tire.

just get the youtube vid, and stop and pause and rewind following every step. you can print out a schematic parallel vs series.

once you get past the first build, its just becomes about quality of your work from then on.
 
artbuguse

artbuguse

Member
Learn a few of the fundamentals.

Understand how DC works (vs AC from the wall).

Watts = volts x amps

Understand forward voltage of your chips and how that relates to the parameters of your driver.

Learn what it means to wire your chips in series (it's easier to understand, imo, vs. parallel. Also, series is recommended, if not required when using a constant current driver). Learn that in series, amps remain constant and you will add forward voltage of each chip in order to provide the appropriate driver.

Delve into how you are going to dissipate the heat your lights will generate and use this to determine whether you will actively or passively cool them.

I knew zero about this stuff before coming here. Everything you need to know can be found in this forum. GroMau5 YouTube channel is also invaluable.

Sure, it would be nice to just plug and play, but where is the fun in that? ;)
 
M

Mike10gs

Member
SoOLED said:
its really not that hard, if I can do it anyone can. I cant even change my tire.

just get the youtube vid, and stop and pause and rewind following every step. you can print out a schematic parallel vs series.

once you get past the first build, its just becomes about quality of your work from then on.
Click to expand...
Thanks. Yes I will be doing it myself. Emailed cob kits and hopefully he will get me set up. That video thing is what I always do.
What's the difference on parralel vs series. I know in solar panels you do the same for the batteries either to get more amp hrs or volts. Is it the same with this.
 
M

Mike10gs

Member
artbuguse said:
Learn a few of the fundamentals.

Understand how DC works (vs AC from the wall).

Watts = volts x amps

Understand forward voltage of your chips and how that relates to the parameters of your driver.

Learn what it means to wire your chips in series (it's easier to understand, imo, vs. parallel. Also, series is recommended, if not required when using a constant current driver). Learn that in series, amps remain constant and you will add forward voltage of each chip in order to provide the appropriate driver.

Delve into how you are going to dissipate the heat your lights will generate and use this to determine whether you will actively or passively cool them.

I knew zero about this stuff before coming here. Everything you need to know can be found in this forum. GroMau5 YouTube channel is also invaluable.

Sure, it would be nice to just plug and play, but where is the fun in that? ;)
Click to expand...
Yea all this definitely sounds like the stuff I was reading when I was making a small offgrid solar panel system.
Will Google some more info on it.

Then the cooling. I've seen some out small of fans on top. Do you just ad another driver to connect them Too?
Thanks everyone for helping.
 
artbuguse

artbuguse

Member
Mike10gs said:
Yea all this definitely sounds like the stuff I was reading when I was making a small offgrid solar panel system.
Will Google some more info on it.

Then the cooling. I've seen some out small of fans on top. Do you just ad another driver to connect them Too?
Thanks everyone for helping.
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The round pin fin heatsinks are typically outfitted to work passively, thus eliminating the need for fans.

Those offering help in this thread will guide you in the right direction regarding the particulars. They know what they are doing.
 
M

Mike10gs

Member
artbuguse said:
The round pin fin heatsinks are typically outfitted to work passively, thus eliminating the need for fans.

Those offering help in this thread will guide you in the right direction regarding the particulars. They know what they are doing.
Click to expand...
Got it. I like how there is still good people out there willing to help.!
 
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